docs: Update GL3.txt to add ARB_internalformat_query2
docs: Update GL3.txt to add ARB_internalformat_query2

Added to OpenGL 4.3 section, tagged as 'in progress (elima)'. See
https://bugs.freedesktop.org/show_bug.cgi?id=92687.

Thanks to Thomas H.P. Andersen for remainding me about this.

v1: - Update the already existing entry in section 4.3
      instead (Ilia Mirkin).
    - Added my BZ nickname as contact person (Felix Schwarz).

Reviewed-by: Ilia Mirkin <bcbbb7aa705ec3a5fc5824c01a845186c3d62fca@alum.mit.edu>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler